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Re: [PATCH -tip -v12 01/11] x86: instruction decoder API
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: Ingo Molnar <mingo at elte dot hu>, Steven Rostedt <rostedt at goodmis dot org>, lkml <linux-kernel at vger dot kernel dot org>, systemtap <systemtap at sources dot redhat dot com>, kvm <kvm at vger dot kernel dot org>, Jim Keniston <jkenisto at us dot ibm dot com>, "H. Peter Anvin" <hpa at zytor dot com>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>, Frederic Weisbecker <fweisbec at gmail dot com>, Andi Kleen <ak at linux dot intel dot com>, Vegard Nossum <vegard dot nossum at gmail dot com>, Avi Kivity <avi at redhat dot com>, Przemys??awPawe??czyk <przemyslaw at pawelczyk dot it>
- Date: Thu, 16 Jul 2009 16:48:40 -0400
- Subject: Re: [PATCH -tip -v12 01/11] x86: instruction decoder API
- References: <20090716155652.6266.39970.stgit@localhost.localdomain> <20090716155700.6266.71011.stgit@localhost.localdomain> <20090716163708.GB5804@merkur.ravnborg.org> <4A5F6356.9080505@redhat.com> <20090716200012.GB5994@merkur.ravnborg.org>
Sam Ravnborg wrote:
> On Thu, Jul 16, 2009 at 01:28:54PM -0400, Masami Hiramatsu wrote:
>> Sam Ravnborg wrote:
>>>> diff --git a/arch/x86/include/asm/inat.h b/arch/x86/include/asm/inat.h
>>>> new file mode 100644
>>>> index 0000000..01e079a
>>>> --- /dev/null
>>>> +++ b/arch/x86/include/asm/inat.h
>>>> @@ -0,0 +1,125 @@
>>>> +#ifndef _ASM_INAT_INAT_H
>>>> +#define _ASM_INAT_INAT_H
>>> [With reference to comment on patch 2/12...]
>>> You create inat.h here.
>>> Could you investigave what is needed to factor out the stuff
>>> needed from userspace so we can avoid the ugly havk where
>>> you redefine types.h?
>> Sorry, I'm a bit confusing.
>> Would you mean that I should break down user_include.h and
>> add those redefined types in inat.h?
> No - try to factor out what is needed for your program
> so you can avoid user_include.h entirely.
>>> Maybe create a inat_types.h + inat.h as we do in other cases?
>> And inat_types.h has two parts, one for kernel, and one for
>> userspace(which is moved from user_include.h), is that right?
> More like inat_types.h include pure definitions and inat.h
> define all the macros (that would be much nicer if expressed
> as static inlines).
OK, some macros still need to be macros, because it will be used
for defining static tables.
> The real thing to consider is what is needed from your userspace
> program and is also required by the kernel.
> I did not event remotely try to find out - as I guess you know it.
> So try to isolate these bits somehow and you have then nicely dropped
> a lot of dependencies on the remainign headers and can thus
> hopefully get rid of the ugly usser_include.h hack.
OK, I'll try to remove user_include.h hack.
Thank you so much!
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com